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A reexamination of the hemodynamic effects of digitalis relative to ventricular dysfunction
A Vitarelli1, F Fedele, A Dagianti
1Cardiac Department, La Sapienza University, Rome, Italy.
Insights
Digitalis, including digoxin, effectively treats heart failure symptoms by improving cardiac function. Long-term oral therapy offers sustained benefits comparable to other treatments for severe heart failure.
Area of Science:
- Cardiology
- Pharmacology
Background:
- Heart failure management often involves addressing symptoms of cardiac dysfunction.
- Digitalis compounds have a long history in treating cardiac conditions.
Purpose of the Study:
- To evaluate the efficacy of digitalis, specifically digoxin, in improving symptoms and hemodynamic parameters in patients with heart failure.
- To compare the effects of digoxin with other therapeutic agents like dobutamine.
Main Methods:
- Review of available data on digitalis administration in heart failure patients.
- Analysis of intravenous and long-term oral digitalis therapy effects on cardiac index and heart rate.
- Assessment of digoxin's impact on systolic and diastolic function, and right ventricular dysfunction.
Main Results:
- Digitalis improves symptoms in heart failure with sinus rhythm and supraventricular arrhythmias.
- Intravenous digitalis increases cardiac index and reduces heart rate in chronic heart failure.
- Long-term oral digoxin therapy provides sustained benefits comparable to dobutamine and adds clinical value when used with vasodilators and diuretics for systolic dysfunction.
Conclusions:
- Digoxin is beneficial for heart failure patients with systolic ventricular dysfunction, especially when combined with other therapies.
- Digoxin's effects on diastolic function vary based on the presence and severity of systolic dysfunction.
- In isolated right ventricular dysfunction, digoxin shows limited hemodynamic impact without concurrent left ventricular dysfunction.
Abstract:
The available data suggest that digitalis improves symptoms of a failing heart in the presence of sinus rhythm as well as supraventricular arrhythmias. Intravenous digitalis administration in patients with chronic heart failure and baseline hemodynamic deterioration increases cardiac index and reduces heart rate. These beneficial effects are maintained with long-term oral therapy and are comparable with those obtained using dobutamine in patients with chronic severe heart failure. The addition of digoxin to therapy with vasodilators and diuretics confers clinical benefit in patients with moderate to severe heart failure symptoms because of systolic ventricular dysfunction. Digoxin effects on diastolic function appear to be different in patients with preserved systolic function in comparison to patients with overt heart failure and systodiastolic dysfunction. In patients with right ventricular dysfunction digoxin does not appear to influence hemodynamic measurements unless concomitant left ventricular dysfunction is present.